Data/hora: 07/06/2024 07:42:39

Provedor de dados: 	56	
País: 	Brazil	
Título: 	Biological significance of miR-126 expression in atrial fibrillation and heart failure	
Autores: 	Wei,X.J.; Han,M.; Yang,F.Y.; Wei,G.C.; Liang,Z.G.; Yao,H.; Ji,C.W.; Xie,R.S.; Gong,C.L.; Tian,Y.	
Data: 	2015-11-01	
Ano: 	2015	
Palavras-chave: 	MicroRNA-126; Atrial fibrillation; Heart failure; Heart function indices; N-terminal prohormone brain natriuretic peptide (NT-proBNP).	
Resumo: 	We investigated the biological significance of microRNA-126 (miR-126) expression in patients with atrial fibrillation (AF) and/or heart failure (HF) to examine the possible mechanism of miR-126-dependent AF and development of HF. A total of 103 patients were divided into three groups: AF group (18 men and 17 women, mean age: 65.62±12.72 years), HF group (17 men and 15 women, mean age: 63.95±19.71 years), and HF-AF group (20 men and 16 women, mean age: 66.56±14.37 years). Quantitative real-time PCR was used to measure relative miR-126 expression as calculated by the 2−ΔΔCt method. miR-126 was frequently downregulated in the 3 patient groups compared with controls. This reduction was significantly lower in permanent and persistent AF patients than in those with paroxysmal AF (P&lt;0.05, t-test). Moreover, miR-126 expression was markedly lower in the HF-AF group compared with the AF and HF groups. The 3 patient groups had higher N-terminal prohormone brain natriuretic peptide (NT-proBNP) levels, lower left ventricular ejection fraction (LVEF), larger left atrial diameter, and higher cardiothoracic ratio compared with controls. There were significant differences in NT-proBNP levels and LVEF among the AF, HF, and HF-AF groups. Pearson correlation analysis showed that relative miR-126 expression was positively associated with LVEF, logarithm of NT-proBNP, left atrial diameter, cardiothoracic ratio, and age in HF-AF patients. Multiple linear regression analysis showed that miR-126 expression was positively correlated with LVEF, but negatively correlated with the logarithm of NT-pro BNP and the cardiothoracic ratio (all P&lt;0.05). Serum miR-126 levels could serve as a potential candidate biomarker for evaluating the severity of AF and HF. However, to confirm these results, future studies with a larger and diverse patient population are necessary.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001100983	
Editor: 	Associação Brasileira de Divulgação Científica	
Relação: 	10.1590/1414-431x20154590	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Medical and Biological Research  v.48 n.11 2015	
Fonte: 	info:eu-repo/semantics/openAccess